Drum.



W. G. BRYANT.

DRUM.

APPLICATION FILED NOV. 26, 1909. 1,009,467. Patented Nov. 21, 1911.

E Eiiin- ||l| IIIIIIIIH "'FII|11EI,I| 1- 1D .1- 1/ f/ y I J I WILLARD G. BRYANT, OF DETROIT, MICHIGAN.

DRUM.

Application filed November 26, 1909.

Specification of Letters Patent.

Patented Nov. 21, 1911.

Serial No. 529,960.

To all whom it may concern:

Be it known that I, WILLARD G. BRYANT, a citizen of the United States, residing at Detroit, county of WVayne, State of Michigan, have invented a certain new and useful Improvement in Drums, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to drums, and has for its object to provide an improved drum and one in which the head may be adjusted by an unskilled person. I secure this object in the device illustrated in the accompanying drawing, in which Figure 1, is a side elevation partly in section of a drum embodying my invention. Fig. 2, shows the head and securing hoops separated from each other. Fig. 3, is a plan view of the grooved hoop. Fig. 4, is a plan view of the hoop which fits into the groove to secure the head. Fig. 5, is a detail sectional view to an enlarged scale illustrating the method of securing the head.

As hitherto constructed, it has been necessary to have skilled labor to fix the head of the drum, and it has been necessary to have the drum head as much as three inches larger than the hoop. By my construction I can use a head only about an inch larger than the hoop, and the head may be secured in position by an unskilled person, and will be firmly and rigidly held.

In the drawing, A represents the barrel of the drum, B, the head and C the tightening hoop, which may be pulled downward by the screws D to tighten the head.

E is a securing-hoop, or flesh-hoop. This has an annular groove 0 whose walls are preferably rectangular in cross-section, formed in its upper surface.

F is a clamping hoop adapted to fit into the groove 6 in the hoop E. The clamping hoop F is a little deeper than the depth of the groove e, or it is of such depth that it shall protrude from said groove when adjusted in position, as shown most distinctly in Fig. 5. To secure the drum head it is laid fiat over the hoop E. The clamping hoop F is then laid upon the drum head B over the groove 6 and pressed down, crimping the edge of the drum head under it as indicated at I) (see Fig. 5). The hoop E is then placed over the barrel A as illustrated in Fig. 1, and the tightening hoop C placed over it, the lower edge of the latter resting upon the upper edge of the clamping hoop F, as shown most distinctly in Fig. 5. The tightening hoop C is then drawn down by the screws D in the usual way, the pressure of the hoop C acting directly upon the -clamping hoop F. The relative size, in a cross-section, of the groove 6 and the clamping hoop F is such that the material of the drum head B is clamped tightly in the groove 6, and this, together with the glutinous nature of the material of the drum head, forms a permanent and fast joint.

What I claim is 1. A drum having in combination, a bar rel, a flesh-hoop adapted to fit over said barrel and provided with a comparatively deep, annular, vertical groove, a drum head adapted to spread over the barrel opening and lie against that part of the surface of the flesh-hoop forming the groove, a clamping-hoop adapted to fit in the remaining space of the groove and hold the drum head without other fastening means, a tightening hoop adapted to press the said clampinghoop tightly into the groove, and means for forcing the tighteninghoop against the clamping-hoop, and for forcing the hoops along the barrel away from the end thereby stretching the drum head substantially as described.

2. A drum having in combination, a barrel, a pair of flesh-hoops, one adapted to fit over each end of the barrel, and each provided with an annular vertical groove, the openings facing in opposite directions, a pair of drum heads, one adapted to spread over each end of the barrel and fit within the groove of the flesh-hoop at that end, a pair of clamping-hoops, one fitting into each groove over the drum head portion therein and adapted to clamp the same therein, a pair of tightening hoops, one fitting over the barrel at each end and adapted to force the clamping-hoop into firm engagement with the drum head and groove, and a screw adapted to force the tightening hoops to- In testimony whereof, I sign this specifi- Ward each ogher and therebfy tighten the en}; cation in the presence of two Witnesses. gagement 0 each pair 0 hoops on eac drum head, and adapted also to cause each WVILLARD BRYANT pair of hoops to approach each other and Witnesses: thereby stretch the drum head substantially VIRGINIA O. SPRATT, as described. ELLIOTT J. STODDARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

